Orbital signals of radial velocities and photometry. (a) Phase-folded radial velocities with a Keplerian orbit fitting for the binary system and residuals. Uncertainties are included but are smaller than the symbols themselves for most measurements. (b) LSP of the orbital signals with the removal of oscillation signals (top panel) and the corresponding phase-folded light curve (bottom panel). Note: the K2 photometry is averaged into 50 measurements by their phase (filled cycles).